On Sun, May 31, 2020 at 10:19 PM Jens Axboe <axboe@xxxxxxxxx> wrote: > We just need this ported to stable once it goes into 5.8-rc: > > https://git.kernel.dk/cgit/linux-block/commit/?h=for-5.8/io_uring&id=904fbcb115c85090484dfdffaf7f461d96fe8e53 How does that work? Who guarantees that the close operation can't drop the refcount of the uring instance to zero before reaching the fdput() in io_uring_enter?